National Weather Service California Nevada River Forecast Center Department of Commerce National Oceanic and Atmospheric Administration National Weather Service

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TRINITY RIVER - HOOPA (HOOC1)
Latitude: 41.05º NLongitude: 123.68º WElevation: 333 Feet
Location: Humboldt County in CaliforniaRiver Group: North Coast
Monitor Stage: 44.0 FeetFlood Stage: 48.0 Feet

Observed Data Credit
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Raw streamflow data is provided by the US Geological Survey (USGS).
View USGS Data for this station location.

Historical Stage/Flow Data
Water Year
Peak Discharge (cfs)
Stage (feet)
Date
 Most Recent 5 Years
2022*
16,600
20.91
Jan 8, 2022
2021*
13,300
19.67
Feb 16, 2021
2020*
25,100
23.65
Jan 26, 2020
2019*
88,100
36.31
Feb 27, 2019
2018*
39,800
26.87
Apr 7, 2018
 Historical High Stage/Flow Events (Period of Record - Oct 1931 to Present)** - Ranked by Flow
1965*
231,000
57.00
Dec 22, 1964
1956
190,000
36.90
Dec 22, 1955
1974*
145,000
45.98
Jan 16, 1974
1983*
122,000
43.16
Jan 27, 1983
1997*
122,000
42.97
Jan 01, 1997
1986*
116,000
42.43
Feb 18, 1986
 * Discharge affected by regulation or diversion
 ** Most recent continuous record back to Oct 1931 with segmented periods back to Oct 1911
Location Photographs
ESRI™ Locator Map
Official 7 Day National Weather Service Forecast   (CAZ105)
Tonight: Rain showers in the evening. Snow showers and chance of thunderstorms through the night. Windy. Some thunderstorms may produce small hail. Snow may be heavy at times. Snow level 1000 feet falling to 500 feet overnight. Snow accumulations of 8 to 12 inches. Lows 23 to 33. Southwest wind 20 to 30 mph in the valleys and southwest 25 to 40 mph at higher elevation.

Saturday: Chance of thunderstorms in the morning. Rain showers and snow showers through the day. Slight chance of thunderstorms in the afternoon. Some thunderstorms may produce small hail in the morning. Some thunderstorms may produce small hail in the afternoon. Snow may be heavy at times in the morning. Snow level 500 feet rising to 1000 feet in the afternoon. Snow accumulations of 5 to 7 inches. Highs 28 to 43. Southwest wind 20 to 25 mph at higher elevation.

Saturday Night: Chance of thunderstorms in the evening. Rain showers and snow showers through the night. Slight chance of thunderstorms overnight. Some thunderstorms may produce small hail in the evening. Some thunderstorms may produce small hail overnight. Snow level 1000 feet falling to 500 feet overnight. Snow accumulations of 4 to 6 inches. Lows 24 to 34.

Sunday: Rain showers, snow showers and slight chance of thunderstorms. Snow level 500 feet rising to 1500 feet in the afternoon. Highs 31 to 46. South wind around 20 mph.

Sunday Night: Rain showers, snow showers and slight chance of thunderstorms. Snow level 1500 to 2000 feet. Lows 28 to 38.

Monday: Rain showers and snow showers. Snow level 2000 feet rising to 3500 feet in the afternoon. Highs 34 to 49. South wind around 20 mph.

Monday Night: Rain showers and snow showers. Lows 30 to 40.

Tuesday: Mostly cloudy. Rain showers and snow showers likely. Highs 36 to 51.

Tuesday Night through Wednesday Night: Mostly cloudy. Chance of rain showers and snow showers. Lows 26 to 36. Highs 37 to 52.

Thursday: Partly cloudy. Slight chance of rain showers and snow showers. Highs 39 to 54.

Thursday Night: Partly cloudy. Lows 25 to 35.

Friday: Partly cloudy. Slight chance of rain showers. Highs 42 to 57.
Impacts - E19 Information
44.0 FeetMinor flooding of the lowest lying areas may occur.
46.0 FeetFlooding of many low-lying areas near the river is likely. Minor flooding may occur over Highway 96 between Willow Creek and Hoopa.
48.0 FeetConsiderable flooding of low-lying areas adjacent to the river including Highway 96 is likely. Significant damage to structures in these areas is possible.
51.0 FeetExtensive flooding of all low-lying areas adjacent to the river including Highway 96 both north and south of Hoopa is likely. Significant damage to structures in these areas is possible.
53.0 FeetExtensive flooding of all low-lying areas adjacent to the river, including Highway 96 north and south of Hoopa. Significant damage to structures in these areas likely.
55.0 FeetExtensive and severe flooding between Willow Creek and Weitchpec and flooding of many homes and businesses in the valley areas. Expect closure of Highway 96 between Willow Creek and Weitchpec.
57.0 FeetSevere flooding of roads, bridges and structures in and around low areas of the river. Many road closures are likely including Highway 96 at several locations between Willow Creek and Weitchpec. Many homes and businesses in valley areas will be inundated.
Product Disclaimer

This river graphic is not intended to serve as a substitute for official flood watches, warnings, advisories, or statements issued by the NWS Eureka Weather Forecast Office. Observations are preliminary and subject to change. River levels identified as "forecast" should be consistent with those contained in official NWS products. River levels identified as "guidance" have significant uncertainty due to future weather or reservoir regulation and are provided for planning purposes only.